freebsd-dev/sys/amd64/include/stdarg.h
Peter Wemm cedb3695c1 Add __va_copy and make it always visible, in spite of the __ISO_C_VISIBLE
setting.  Make va_copy be an alias if __ISO_C_VISIBLE >= 1999.

Why?  more than a few ports have an autoconf that looks for __va_copy
because it is available on glibc.  It is critical that we use it if
at all possible on amd64.  It generally isn't a problem for i386 and its
ilk because autoconf driven code tends to fall back to an assignment.
2003-10-24 02:50:39 +00:00

73 lines
2.4 KiB
C

/*-
* Copyright (c) 2002 David E. O'Brien. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _MACHINE_STDARG_H_
#define _MACHINE_STDARG_H_
#include <sys/cdefs.h>
#include <sys/_types.h>
#ifndef _VA_LIST_DECLARED
#define _VA_LIST_DECLARED
typedef __va_list va_list;
#endif
#if defined(__GNUC__)
#define va_start(ap, last) \
__builtin_stdarg_start((ap), (last))
#define va_arg(ap, type) \
__builtin_va_arg((ap), type)
#define __va_copy(dest, src) \
__builtin_va_copy((dest), (src))
#if __ISO_C_VISIBLE >= 1999
#define va_copy(dest, src) \
__va_copy(dest, src)
#endif
#define va_end(ap) \
__builtin_va_end(ap)
#elif defined(lint)
/* Provide a fake implementation for lint's benefit */
#define __va_size(type) \
(((sizeof(type) + sizeof(long) - 1) / sizeof(long)) * sizeof(long))
#define va_start(ap, last) \
((ap) = (va_list)&(last) + __va_size(last))
#define va_arg(ap, type) \
(*(type *)((ap) += __va_size(type), (ap) - __va_size(type)))
#define va_end(ap)
#endif
#endif /* !_MACHINE_STDARG_H_ */